MDD021A-N-100-N2K-032MA0

MDD Synchronous Motors

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The Bosch Rexroth Indramat MDD021A-N-100-N2K-032MA0 belongs to the MDD Synchronous Motors series and has a motor size of 021. The motor offers 0.15 Nm continuous torque at standstill, integrated absolute encoder feedback, and a standard balancing level. It features a keyway shaft type and side A connector interface.

Technical Specifications

Balancing
Standard

Holding Brake
Without blocking brake

Centering Diameter
32 mm

Housing
Standard

Encoder
Integrated absolute encoder

Motor Feedback
Resolver feedback

Continuous Torque at Standstill
0.15 Nm

Motor Length Code
A

Motor Size
021

Nominal Speed
10000 min⁻¹

Shaft Seal
Without shaft seal

Shaft Type
keyway

Connection Direction
Side A

Connection Type
Connector

Product Type
Motor for digital drive controllers

Shaft End
Standard (without side B shaft end)

Frequently Asked Questions

What are the implications of the motor’s balancing level being “Standard”?

A standard balancing level means there will be more vibration at high rpm compared to precision-balanced motors, so for applications running near the 10,000 min⁻¹ limit you’ll want to evaluate whether vibration damping or additional balancing is needed. It’s usually acceptable for light precision tasks, but not for ultra-high speed or very low noise contexts.

How does the integrated absolute encoder feedback impact control precision and startup behaviour?

The absolute encoder provides rotor position immediately at power-on, avoiding the need for homing routines, which speeds up initialization and improves positional accuracy especially in light of the high nominal speed. This means systems can have better closed-loop stability and less drift under transient loads.

Given the “resolver feedback” feature, what are the trade-offs compared with pure encoder feedback?

Resolvers are very robust to electrical noise, temperature, and harsh environments but have lower resolution and more complex signal conditioning than solid-state encoders. So in environments with EMI or moisture they’re more reliable, but you may lose some fine precision or need more filtering in software/hardware.

How critical is shaft type “keyway” for mechanical alignment and torque transmission?

A keyway shaft allows rigid torque transfer without slippage when properly mated to matching hub or coupling, but mis-alignment or loose fit can introduce torsional backlash or stress concentrations. It necessitates careful machining/installation of the mating part and correct alignment to avoid fatigue or vibration.

What does the “Side A connector” interface mean for cabling and layout in machine design?

Side A indicates the connector is mounted on one designated end, which can constrain how you route cables and how much clearance you need; you’ll need to ensure there’s enough space for connector insertion/removal. Also consider that connector orientation may affect access for servicing or replacement.

Common Misspellings

Internal Product Review

The MDD021A-N-100-N2K-032MA0 motor from Bosch Rexroth features a 32 mm centering diameter, 0.15 Nm continuous torque, and a nominal speed of 10,000 min⁻¹. It includes resolver feedback, a keyway shaft, and side-A connector configuration. This motor is ideal for roles in electronics assembly, light automation systems, and precision packaging machinery.